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Texas Instruments LPC660AIMX/NOPB
- Part No.:
- LPC660AIMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LPC660AIMX/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,398
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Product details
Overview
LPC660AIMX/NOPB from Texas Instruments is a low-power CMOS quad operational amplifier optimized for single-supply operation from +5 V to +15 V, featuring rail-to-rail output swing, ultra-low input bias current (2 fA), and 120 dB open-loop voltage gain into 100 kΩ. It delivers micropower operation at 160 μA per amplifier and supports precision applications including high-impedance buffering and long-term integration.
For engineers reviewing the LPC660AIMX/NOPB datasheet, LPC660AIMX/NOPB pinout, LPC660AIMX/NOPB application, or LPC660AIMX/NOPB equivalent, key selection criteria include its 3 mV input offset voltage, 0.11 V/μs slew rate, −40°C to +85°C operating temperature range, SOIC-14 package, and compatibility with 5 kΩ and 100 kΩ loads.
Technical Context
The LPC660AIMX/NOPB employs a nonstandard topology where the output is taken directly from the integrator stage-enabling rail-to-rail swing without a traditional unity-gain buffer. This architecture incorporates dual feed-forward compensation (Cf and Cff) and a push-pull output stage to sustain stability and drive capability down to 500 Ω.
Its input common-mode range includes V− (ground in single-supply mode), and it achieves 83 dB CMRR and >1 TΩ input resistance. The design avoids instability with capacitive loads up to ~100 pF when using series output resistors (50–100 Ω) and feedback capacitors (5–10 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.75 V to +15.5 V - supports wide single-supply operation without level-shifting circuitry. |
| Input Bias Current | 2 fA typical - enables femtoampere-level leakage-sensitive designs like photodiode amplifiers. |
| Input Offset Voltage | 3 mV max - ensures <0.3% error in 1 V full-scale precision current-to-voltage conversion. |
| Slew Rate | 0.11 V/μs - sufficient for ≤1 kHz small-signal settling in low-distortion (<0.01%) audio and sensor conditioning. |
| Open-Loop Gain | 120 dB into 100 kΩ - provides ≥10⁶ closed-loop accuracy for gain-setting resistors up to 10 MΩ. |
| Output Swing | 0.004 V above V− and 0.007 V below V+ (at V+ = 15 V, RL = 100 kΩ) - delivers true rail-to-rail dynamic range. |
| Quiescent Current | 160 μA per amplifier - enables battery-powered systems with >1-year runtime on coin cells. |
Pinout & Package
Package: 14-pin SOIC (D0014A), 3.9 mm × 8.75 mm body, 1.27 mm pitch, 1.75 mm max height, RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node requiring guard ring layout to preserve 2 fA bias current performance. |
| 2 | Non-Inverting Input (Amplifier A) | Accepts input common-mode voltage down to V− (0 V), enabling ground-referenced sensing. |
| 3 | Output (Amplifier A) | Rail-to-rail capable; drives 5 kΩ loads with 4.75 V swing at V+ = 5 V. |
| 4 | V− (Ground or Negative Supply) | Reference for all four amplifiers; input common-mode includes this pin. |
| 5 | Non-Inverting Input (Amplifier B) | Independent high-Z input; matches Pin 2 electrical specs and layout requirements. |
| 6 | Inverting Input (Amplifier B) | Matches Pin 1; identical bias current and offset specifications. |
| 7 | Output (Amplifier B) | Electrically isolated from other outputs; amp-to-amp isolation >130 dB at 1 kHz. |
| 8 | Output (Amplifier C) | Third independent output; same rail-to-rail swing and load drive as Pins 3 and 7. |
| 9 | Inverting Input (Amplifier C) | Fourth amplifier input; fully matched to Pins 1 and 6 in offset, drift, and noise. |
| 10 | Non-Inverting Input (Amplifier C) | Fourth high-Z input; supports simultaneous multi-channel high-impedance buffering. |
| 11 | V+ (Positive Supply) | Single-supply rail; must not exceed 13 V if output is shorted to V+ to ensure reliability. |
| 12 | Non-Inverting Input (Amplifier D) | Enables four-channel signal conditioning on one die without external multiplexing. |
| 13 | Inverting Input (Amplifier D) | Final input pair; shares same 1.3 μV/°C offset drift as all other inputs. |
| 14 | Output (Amplifier D) | Fourth rail-to-rail output; supports independent active filtering or sample-and-hold per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range across supply rails - critical for maximizing ADC input utilization in low-voltage systems. |
| Ultra-low input bias current (2 fA) | Enables direct connection to high-impedance sources (e.g., pH electrodes, piezoelectric sensors) without signal degradation. |
| Low input offset voltage drift (1.3 μV/°C) | Ensures stable DC accuracy over industrial temperature range without recalibration. |
| Micropower operation (160 μA/amplifier) | Supports always-on sensor nodes with sub-1 μW per channel power budget. |
| Specified for 5 kΩ and 100 kΩ loads | Guarantees performance with both precision resistor networks and moderate-output-drive transducers. |
| High voltage gain (120 dB) | Permits accurate closed-loop gains >1000 with minimal resistor tolerance impact on system accuracy. |
Applications
| Photodiode Signal Conditioning | Precision Current-to-Voltage Conversion |
|---|---|
|
Use Scenario: Converting nanoampere-level photocurrent from silicon photodiodes into measurable voltage signals in optical smoke detectors. IC Role / Device Role / Timing Role: High-impedance transimpedance amplifier with 2 fA input bias minimizing dark-current error. Use Value: Enables detection of sub-10 nA photocurrents with <1 mV output error, extending device sensitivity by 2× vs. bipolar op amps. |
Use Scenario: Converting 4–20 mA industrial loop currents into 0–5 V analog inputs for PLC ADCs. IC Role / Device Role / Timing Role: Precision I-to-V converter with 3 mV offset and 120 dB gain ensuring ±0.05% full-scale accuracy. Use Value: Eliminates need for external offset trimming or auto-zero circuitry, reducing BOM count and calibration time. |
| Long-Term Integrator | High-Impedance Preamplifier |
|
Use Scenario: Integrating charge from radiation dosimeters over hours to measure cumulative exposure. IC Role / Device Role / Timing Role: Ultra-low-leakage integrator using 2 fA bias current and guarded PCB layout. Use Value: Achieves <0.1% drift over 10-hour integration windows, outperforming standard CMOS op amps by 10×. |
Use Scenario: Amplifying microvolt-level EEG signals from dry-contact scalp electrodes. IC Role / Device Role / Timing Role: First-stage preamplifier with >1 TΩ input resistance and 42 nV/√Hz input noise. Use Value: Preserves signal integrity in high-source-impedance biopotential acquisition, improving SNR by ≥15 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC662IMX/NOPB | Dual-channel only; identical 2 fA bias current and rail-to-rail output but half the channel count. | Requires two devices for quad functionality; increases board area and power by ~2×. | Select when dual-channel suffices and space allows duplication. |
| TLC27L4CDR | Higher input offset (10 mV max); 20× higher bias current (50 pA); lower gain (100 dB); SOIC-14 compatible. | Not suitable for femtoampere or sub-millivolt-offset applications; acceptable for cost-sensitive general-purpose use. | Choose only for non-critical DC-coupled buffers where offset and leakage are secondary. |
Compared with LMC662IMX/NOPB and TLC27L4CDR, the LPC660AIMX/NOPB uniquely delivers quad-channel rail-to-rail operation with femtoampere bias current and guaranteed 3 mV offset - making it irreplaceable in high-precision, low-power, multi-channel analog front-ends.
Availability
LPC660AIMX/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, environmental sensor nodes, and industrial process control requiring stable component supply, long-lifecycle support, and guaranteed parametric compliance across −40°C to +85°C.
Supply support for LPC660AIMX/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op amp design and manufacturing.
The LPC660AIMX/NOPB belongs to TI's legacy low-power CMOS op amp family, engineered specifically for single-supply, high-impedance, micropower applications in test equipment, portable instrumentation, and sensor interfaces.
FAQ
What is the maximum supply voltage for LPC660AIMX/NOPB?
The absolute maximum supply voltage (V+ − V−) for LPC660AIMX/NOPB is 16 V, but continuous operation above 13 V requires avoiding output short-circuit to V+ to prevent reliability degradation. The recommended operating range is +4.75 V to +15.5 V, with full specification compliance across that span for the LPC660AIMX/NOPB.
Does LPC660AIMX/NOPB support true rail-to-rail input?
No - LPC660AIMX/NOPB features rail-to-rail *output* swing, but its input common-mode range extends to V− (including ground) and up to V+ − 1.9 V (at 25°C). It does not accept signals at V+, so it is not a full rail-to-rail input op amp. This limitation is explicitly documented in the DC Electrical Characteristics table for LPC660AIMX/NOPB.
Can LPC660AIMX/NOPB drive capacitive loads?
LPC660AIMX/NOPB can drive capacitive loads up to ~100 pF stably in unity-gain follower configuration when using external compensation: a 50–100 Ω series resistor at the output and a 5–10 pF capacitor from inverting input to output. Without compensation, oscillation may occur - a behavior confirmed in Figure 23 and Application Hints for LPC660AIMX/NOPB.
What is the thermal resistance θJA for LPC660AIMX/NOPB?
The junction-to-ambient thermal resistance (θJA) for LPC660AIMX/NOPB in its 14-pin SOIC package is 115°C/W, as specified in the Operating Ratings table. This value assumes standard JEDEC 2-layer board mounting and determines safe power derating - for example, at 85°C ambient, max dissipation is (150°C − 85°C)/115°C/W ≈ 565 mW total for all four amplifiers.
Is LPC660AIMX/NOPB pin-compatible with other TI quad op amps?
LPC660AIMX/NOPB uses the industry-standard 14-pin SOIC pinout for quad op amps (e.g., same as LM324, TL084), but functional differences - including rail-to-rail output, 2 fA bias current, and absence of internal ESD diodes to rails - mean it is not a drop-in replacement. Circuit validation is required before substituting LPC660AIMX/NOPB in existing designs.
LPC660AIMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 0.11V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.002 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 160µA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 15.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LPC660AIMX/NOPB FAQ
1.How can I place an order for LPC660AIMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC660AIMX/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LPC660AIMX/NOPB reliable?
The price and inventory of LPC660AIMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC660AIMX/NOPB is usually 5 days.
3.What payment methods are accepted for LPC660AIMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC660AIMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC660AIMX/NOPB?
LPC660AIMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC660AIMX/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LPC660AIMX/NOPB?
For technical support, including LPC660AIMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC660AIMX/NOPB requirements.
6.How does Aetrix verify that LPC660AIMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LPC660AIMX/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LPC660AIMX/NOPB meets industry standards.
7.What is the process for return or replacement of LPC660AIMX/NOPB?
All LPC660AIMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LPC660AIMX/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LPC660AIMX/NOPB part is unused and in its original packaging.
Return procedure for LPC660AIMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC660AIMX/NOPB Tags
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LM358DT
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LM358DR
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM358P
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